Requirements For Indoor Unit Field Wiring; Routing; Indoor Switch Box Connections; Connection Heater Kit Signals (If Applicable) - Daikin EKCBX008BBV3 Installation Manual

11.8. Requirements for indoor unit field wiring
Selection and sizing should be done in accordance with the
applicable legislation based on the information in the table below:
Cable
(a)
Item bundle Desciption
1 HV Indoor unit control signals
2 HV Indoor unit pump and
heater control signals
3 LV Thermistor
interconnection cable
(supplied with unit)
4 HV Heater kit control signals
(only for EKMBUH)
5 LV Heater kit R12T
thermistor (only for
EKMBUH)
6 HV Alarm output (only for
EKRP1HB* and
EKSOLHWAV1 option)
7 HV Cooling/heating on/off
output (only for
EKRP1HB* and
EKSOLHWAV1 option)
8 HV Solar input (only for
EKRP1HB*and
EKSOLHWAV1 option)
9 LV Changeover to boiler
output (only for
EKRP1HB* and
EKSOLHWAV1 option)
10 HV 2-way valve (only for
EKCBX* units)
11 HV Room thermostat (only for
EKRTW, EKRTR1 or
EKRTETS option)
12 LV user interface mounted on
indoor unit front panel
LV user interface mounted
apart from indoor unit
13 HV 3-way valve (only for
EKHW option)
14 HV Solar pump and thermal
protector (only for
EKSOLHWAV1 option)
15 LV R5T Tank thermistor (only
for EKHW option)
16 HV Booster heater power
supply and thermal
protector (only for EKHW
option)
17 HV Domestic hot water tank
thermal protector (only for
EKHWSU option)
18 PS Booster heater power
supply (only for EKHW
option)
19 PS Normal kWh rate power
supply
(a) PS = Power supply
HV = High voltage
LV = Low voltage
(b) Minimum cable section = 0.75 mm
2
(c) Cable section 0.75 mm till 1.25 mm
(d) Refer to the nameplate of the domestic hot water tank
2
(e) Cable section = 2.5 mm
Installation manual
18
Required Maximum
number of running
conductors current
3 + GND Minimum
cable section
2.5 mm
4 1.25 A
8 Supplied with
the unit
(b)
5
(b)
2
(b)
2
(b)
2
(b)
2
(b)
2
(b)
2
(b)
1, 3, 4 or 5
(b)
–
(c)
2
(b)
3
(b)
2
2
(d)
4 + GND
(b)
2
(d)
2 + GND
(e)
2 + GND
2
2
, maximum length: 50 m

11.9. Routing

WARNING
It is important to keep the high voltage, low voltage and
power supply wiring separated from each other. In order to
avoid any electrical interference the distance between both
wiring should always be at least 25 mm.
2
The indoor unit has several openings on the bottom side for field
(b)
wiring. Use the appropriate opening to route the high voltage, low
voltage and power supply wires as shown in the figure below.
PS/HV HV

11.10.Indoor switch box connections

Connection of control signals and thermistor cable
F2B
X4M
X3M
X14M
4 5 1 2
1 Indoor unit control signals
2 Indoor unit pump and heater control signals
3 Thermistor interconnection cable
4
5 Normal kWh rate power supply
1 Remove the control box cover.
2 Using the appropriate cables, route and connect the control
cables to the appropriate terminals as shown on the wiring
diagram supplied with the unit and according to the figure above.
3 Route and connect the thermistor interconnection cable as
shown in the figure above.
Be sure not to force the connectors. The connectors lock in one
position only. Check both connector sides for correct matching.
4 Route the cables through the cable holders and secure the
cables to the cable tie mountings with cable ties as shown in the
figure above.
5 Close the control box cover. Take care not to pinch any wires.

Connection heater kit signals (if applicable)

Refer to the installation manual of the EKMBUH heater kit.
PS Power supply
HV High voltage
LV Low voltage
LV
SS2
X9A
X13A
FU1
FU2
X2M
In case no EKHW* option with booster heater is
installed, connect an extra ground wire to the
ground terminal.
Unit for air to water heat pump system
4PW66983-1C – 08.2011
3
EKCBX/H008BBV3